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      1 // Copyright 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CC_OUTPUT_OUTPUT_SURFACE_CLIENT_H_
      6 #define CC_OUTPUT_OUTPUT_SURFACE_CLIENT_H_
      7 
      8 #include "base/callback.h"
      9 #include "base/memory/ref_counted.h"
     10 #include "base/time/time.h"
     11 #include "cc/base/cc_export.h"
     12 #include "cc/output/begin_frame_args.h"
     13 #include "cc/output/context_provider.h"
     14 #include "ui/gfx/rect.h"
     15 
     16 namespace gfx {
     17 class Transform;
     18 }
     19 
     20 namespace cc {
     21 
     22 class CompositorFrameAck;
     23 struct ManagedMemoryPolicy;
     24 
     25 class CC_EXPORT OutputSurfaceClient {
     26  public:
     27   // Called to synchronously re-initialize using the Context3D. Upon returning
     28   // the compositor should be able to draw using GL what was previously
     29   // committed.
     30   virtual bool DeferredInitialize(
     31       scoped_refptr<ContextProvider> offscreen_context_provider) = 0;
     32   virtual void ReleaseGL() = 0;
     33   virtual void SetNeedsRedrawRect(gfx::Rect damage_rect) = 0;
     34   virtual void BeginFrame(const BeginFrameArgs& args) = 0;
     35   virtual void OnSwapBuffersComplete(const CompositorFrameAck* ack) = 0;
     36   virtual void DidLoseOutputSurface() = 0;
     37   virtual void SetExternalStencilTest(bool enabled) = 0;
     38   virtual void SetExternalDrawConstraints(const gfx::Transform& transform,
     39                                           gfx::Rect viewport,
     40                                           gfx::Rect clip,
     41                                           bool valid_for_tile_management) = 0;
     42   virtual void SetDiscardBackBufferWhenNotVisible(bool discard) = 0;
     43   virtual void SetMemoryPolicy(const ManagedMemoryPolicy& policy) = 0;
     44   // If set, |callback| will be called subsequent to each new tree activation,
     45   // regardless of the compositor visibility or damage. |callback| must remain
     46   // valid for the lifetime of the OutputSurfaceClient or until unregisted --
     47   // use SetTreeActivationCallback(base::Closure()) to unregister it.
     48   virtual void SetTreeActivationCallback(const base::Closure& callback) = 0;
     49 
     50  protected:
     51   virtual ~OutputSurfaceClient() {}
     52 };
     53 
     54 }  // namespace cc
     55 
     56 #endif  // CC_OUTPUT_OUTPUT_SURFACE_CLIENT_H_
     57